I can't guess why you would do such a thing but look up the old ROT13 and see if that command will do.
I would like to XOR each byte of a file with the corresponding byte of another file, creating an output file of the XOR'ed bytes using BASH.
Currently, I can use the terminal in OS X, changing directories, listing their contents, and using nano. I believe I will need to write a collection of BASH commands in nano and save them as an executable file.
Any hints would be greatly appreciated.